Here is a cool little game called "Eagle Eyes" developed by Audubon and the Cornell Lab of Ornithology. You're presented with five groups of two photographs. You have to spot five differences in between the photos in each group. It's easier than it sounds.
The photos are mostly of birds. The photos themselves are impressive. You can choose from several timed versions of the game. Or, you can play without time restrictions. It's a little addictive once you get started. Good luck!
...and while I'm on the subject of 'Fun Stuff' here's a neat video of a parrot that ended up on Animal Planet's Pet Star. Many of you may have seen this already, but I thought I would share again. Parrots are considered to be among the most intelligent birds. You'll be amazed by how many tricks he can do.